Underground coal separation process
a coal separation and process technology, applied in wet separation, solid separation, chemistry apparatus and processes, etc., to achieve the effect of reducing the quantity of raw coal entering, reducing the sliming phenomenon of raw coal, and reducing production cost and equipment investmen
Active Publication Date: 2022-07-26
CHINA UNIV OF MINING & TECH
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Benefits of technology
The patent describes a special jigging machine that can handle high amounts of equipment and has a compact design suitable for narrow spaces. The machine uses a water medium to accurately separate raw coal from middling and clean coal. This reduces energy consumption and environmental pollution, while also improving efficiency in underground mining.
Problems solved by technology
At present, overground coal separation is dominated by the wet method, and the on-site application effect of dry coal preparation is poor, so that the built dry coal preparation process is idle or changed, and dry coal preparation is applied to gangue predischarging in most cases.
Method used
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[0019]The specific implementations of the present invention are further described below in detail with reference to the accompanying drawings.
[0020]As shown in FIG. 1 and FIG. 2, the underground coal separation process adopting a water medium according to the present invention includes the following steps:
[0021]exploited raw coal 1 is fed into a Φ25 mm raw coal classifying screen A by a raw coal feeding chute T for screening to obtain a classifying screen oversize product 2 with a particle size greater than 25 mm and a classifying screen undersize product 3 with a particle size less than 25 mm;
[0022]the classifying screen oversize product 2 with a particle size greater than 25 mm is fed into a TDS intelligent dry separator B to perform dry coal preparation, and separation is conducted to respectively obtain dry separation clean coal 4 and dry separation gangue 5 to be discharged;
[0023]the classifying screen undersize product 3 with a particle size less than 25 mm is fed into a speci...
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Disclosed is an underground coal preparation process adopting a water medium, comprising: feeding exploited raw coal into a Φ25 mm raw coal classifying screen for screening; performing dry coal preparation on a classifying screen oversize product with a particle size greater than 25 mm and feeding a classifying screen undersize product with a particle size less than 25 mm into a special underground compact jigging machine for sorting to obtain jigging machine overflow clean coal, jigging middling coal and jigging gangue; screening and dewatering the jigging machine overflow clean coal to obtain a clean coal product, and screening and dewatering the jigging middling coal to obtain a middling coal product, sorting slime water to be sorted and generated during sorting to obtain coarse clean coal slime and coarse middling coal slime, and performing circulating water treatment on a final liquid.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a 371 of international application of PCT application serial no. PCT / CN2019 / 083665, filed on Apr. 22, 2019, which claims the priority benefit of China application no. 201910174675.0, filed on Mar. 8, 2019. The entirety of each of the above mentioned patent applications is hereby incorporated by reference herein and made a part of this specification.TECHNICAL FIELD[0002]The present invention relates to an underground coal separation process, and in particular, to an underground coal separation process using dry-wet combined coal separation, applicable to the field of coal separation.BACKGROUND[0003]An existing underground coal separation method includes dry coal preparation represented by wind coal separation and heavy medium fluidized bed coal separation as well as wet coal preparation represented by jigging coal separation and heavy medium cyclone coal separation. The two coal separation methods have their own advantag...
Claims
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IPC IPC(8): B03B9/00B03B7/00B03B5/10
CPCB03B9/005B03B7/00B03B5/10
Inventor GUI, XIAHUILIU, MINXING, YAOWENXIA, YANGCHAOCAO, YIJUNLUO, JIAQIANLIU, PEIKUNWANG, ZHIGANG
Owner CHINA UNIV OF MINING & TECH